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Old 07-11-2013, 03:17 AM #33
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Default Re: 8 line TUNABLE argon

I still find it oddly humorous how this was received by you guys like a closely guarded secret on how to separate wavelengths. I feel like Prometheus handing over fire, lol.


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Old 07-11-2013, 03:22 AM #34
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Default Re: 8 line TUNABLE argon

I just never thought about the slit. I alzo figured they would be too close together at such a close distance but it seemed to work fine.
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Old 07-11-2013, 07:24 PM #35
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Default Re: 8 line TUNABLE argon

I tried before with my HeNe, I just couldn't perfect it without the razors.
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Old 07-11-2013, 11:22 PM #36
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Default Re: 8 line TUNABLE argon

Nice new toy bloom - I'm jealous - go away on holidays, and come back and find yet another member has a new gas laser - and tuneable too!

Sig, I'll try the slit method once I get my argon - prolly mount it all on a baseplate I can get from a local metal suppliers, a couple of micro mounts, and find something I can use for the diffraction grating's stage
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Old 07-12-2013, 12:24 AM #37
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Default Re: 8 line TUNABLE argon

I would love to see a picture or video of the laser and how it tunes ...
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Old 07-12-2013, 01:59 AM #38
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Default Re: 8 line TUNABLE argon

Sig, I just had never thought of it!

My question is, do glass reflecting gratings produce only first order dots? Because otherwise there would be power loss :\
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Old 07-12-2013, 02:09 AM #39
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Default Re: 8 line TUNABLE argon

I can snap some after work.
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Old 07-12-2013, 02:25 AM #40
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Default Re: 8 line TUNABLE argon

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Originally Posted by Wolfman29 View Post
Sig, I just had never thought of it!

My question is, do glass reflecting gratings produce only first order dots? Because otherwise there would be power loss :\
It depends on the lines/mm but a diffraction mirror will not have a 0 order unsplit beam so you get the most in each separated line.

I *think* a 3000line/mm grating will produce only a single order. I may be wrong, it has been many years since I've seen high grade gratings in person.
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Old 07-12-2013, 02:30 AM #41
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Default Re: 8 line TUNABLE argon



Sig? This image seems to suggest that there are 0th order beams? It's from ThorLabs.
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Old 07-12-2013, 02:34 AM #42
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Default Re: 8 line TUNABLE argon

No idea then. I've seen one used in person years ago, there was no mixed beam visible but perhaps it was occluded somehow before exiting the aperture.
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Old 07-12-2013, 02:37 AM #43
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Default Re: 8 line TUNABLE argon

Not sure if this answers your question or not bu my 1800 line mirror produces 2 full 6 line sets and one mixed split off in between them.
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Old 07-12-2013, 02:52 AM #44
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Default Re: 8 line TUNABLE argon

Quote:
Originally Posted by Wolfman29 View Post
Sig, I just had never thought of it!

My question is, do glass reflecting gratings produce only first order dots? Because otherwise there would be power loss :\
There's a LOT of power loss anyway. Most of the beam isn't diffracted at all, and you'd be lucky to get much more than 15% in a single first order.
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Old 07-12-2013, 03:01 AM #45
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Default Re: 8 line TUNABLE argon

That's a shame. Then there is no way to split a beam without a huge amount of power loss, I take it? I was thinking may prism... but not sure.
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Old 07-12-2013, 03:31 AM #46
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Default Re: 8 line TUNABLE argon

A series of prisms is the only thing that comes to mind.
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Old 07-12-2013, 03:35 AM #47
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Default Re: 8 line TUNABLE argon

I was thinking about that....
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Old 07-12-2013, 03:40 AM #48
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Default Re: 8 line TUNABLE argon

A diffraction mirror perhaps.
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HeNe/gas reference thread

Last edited by bloompyle; 07-12-2013 at 03:40 AM.
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